Bokutachi wa Benkyou ga Dekinai - Vol. 2 Ch. 11 - The Weight is the retribution for a genius' [X]

[MangaDex]

 

[Glomoro]

I was pretty sure this was gonna be the "broken scale" sort of thing when she said cutting down on snacks while they all studied together wasn't helping, but apparently the moron was binging alone before bed.